From the hallway, a furnace that will not heat looks the same no matter what broke. Inside the cabinet, though, the sequence is strict: inducer on, pressure switch closed, igniter glowing, gas valve open, burners lit, flame proven, and finally the blower moving heat through the ducts. Diagnosis is mostly a matter of finding where that chain breaks. In Framingham homes, it tends to be the same handful of culprits: a flame sensor coated in oxide, a hot surface igniter cracked by thermal cycling, a pressure switch held open by a tired inducer or a plugged condensate trap, or a control board with a burned relay.
When the AC quits in summer, see AC Repair.
Signs You Need Furnace Repair in Framingham
The sooner you notice these red flags, the easier and cheaper the fix. Keep an eye out for the following clues:
- A furnace that shuts off every few minutes before the house warms up
- Squealing or grinding from the blower compartment
- Clicking and a glowing igniter with no burner flame
- Repeated shutdowns just seconds after the burners light
- A bang or boom when the burners ignite late
- A pilot or burner flame that is lazy yellow instead of crisp blue
- Water, rust stains, or black soot around the flue or cabinet
- The blower runs constantly but the air never warms
Don't Wait for a Total Failure
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. Call (774) 533-7753 at the first sign of trouble.
